Pioneer UDP-LX800 Universal BD Player Lab Report

Lab Report

Borrowing heavily from the design of its PD-70AE CD/SACD player [HFN May '18] with its two ESS9026 Pro DACs, the performance of the UDP-LX800 is nigh-on identical, with very minor 'tweaks'. Once again the player's THD and noise is largely governed by the balanced analogue stage over the top 20dB of its dynamic range. So, at the maximum 4.3V output, distortion is 0.0012-0.0235% (20Hz-20kHz) but this drops to 0.0002-0.0006% at –15dBFs and 0.0009-0.0025% at –30dBFs [see Graph 1, below]. High frequency distortion, and noise, is necessarily higher via SACD because of its requantisation noise – amounting to 0.044%/20kHz and 0.055%/30kHz. The response via SACD is also governed by the player's filtering of this noise, but reaches out to –0.3dB/20kHz, –0.5dB/40kHz, –3.0dB/60kHz, –9.1dB/80kHz and –17.4dB/100kHz (slightly flatter than the PD-70AE).


Distortion vs. digital signal level over a 120dB dynamic range – 48kHz/24-bit LPCM (1kHz, red; 20kHz, blue) vs. CD (1kHz, black; 20kHz, grey)


High resolution 48kHz/24-bit jitter spectrum via USB-A (black, with markers) vs. SACD (red)

The response via CD and USB-A digital inputs is determined by your choice of digital filter. The default 'Sharp' is a linear phase type offering a modest 58dB of stopband rejection and a response that's flat to –0.05dB/20kHz, –0.4dB/45kHz and –1.0dB/90kHz with CD/48kHz, 96kHz and 192kHz media, respectively. 'Short' and 'Slow' are both minimum phase types with no pre-ringing, but trades exaggerated and reduced post-ringing for steep and gentle treble roll-offs, respectively. 'Short' extends to –0.1dB/20kHz while 'Slow' is flat to within ±0.1dB up to 16kHz but then rolls off to –5.0dB/20kHz. Regardless of filter or media, the A-wtd S/N is a wide 113.5dB and low-level linearity good to ±0.1dB over a 100dB dynamic range. Jitter, at all sample rates, falls within 50-100psec but requantisation noise is clear to see – if inaudible – with SACD [red spectrum, Graph 2]. PM

Maximum output level / Impedance 4.36Vrms / 49-53ohm (XLR)
A-wtd S/N ratio (LPCM / CD / SACD) 113.2dB / 113.7dB / 113.6dB
Distortion (1kHz, 0dBFs/–30dBFs) 0.0012% / 0.00079%
Distortion & Noise (20kHz, 0dBFs/–30dBFs) 0.0235% / 0.0018%
Freq. resp. (20Hz-20kHz/45kHz/90kHz) +0.0 to –0.0dB/–0.4dB/–1.0dB
Digital jitter (48kHz/96kHz / SACD) 100psec / 55psec / 55psec
Resolution @ –100dB (LPCM / SACD) ±0.1dB / ±0.1dB
Power consumption 22W (1W standby)
Dimensions (WHD) / Weight 435x131x339mm / 13.8kg
Price: £2200
Onkyo & Pioneer Corp.
Osaka, Japan
Supplied by: Pioneer & Onkyo Europe GmbH, Middlesex
0208 836 3500